I'm trying to install a ceiling light. The pre-existing outlet box is rather old, the house was built in '54 and I'm not sure when this wiring was put in exactly, but none of the wires have their colors.
There are 2 holes in the outlet box being used and 3 wires in total. 2 wires go from one hole to the other. 1 of them simply goes from hole to hole, very close to the base of the outlet box. The other wire extends a ways downwards and was stripped and twisted together with some copper exposed. The third wire only comes out of one hole and comes down with it's end exposed and some copper a the tip. I'm attaching a link to pictures of the situation.
My question is which wire is the grounding wire, which is the black, and which is the white. Is there a way to discern this myself or will I need to get some sort of professional help? The set-up looks nothing like the one in the instructions, so I'm wondering if this is some sort of old-school deal meant to bypass using the grounding wire on a light fixture. Any help is appreciated.
Here are pictures on Photobucket: